json学习笔记

json学习笔记

1.需要把json的包源码搞出来，我们就可以测试了。（下载地址）https://github.com/douglascrockford/JSON-java

2，测试代码如下：

package  shengsiyuan.lxd.json;

import  org.json.JSONArray;
import  org.json.JSONException;
import  org.json.JSONObject;
import  org.junit.Test;

public   class  TestJson
{
    @Test
     public   void  TestJson01()  throws  JSONException
    {
        String jsonContent  =   " {'name':'lixiaodaoaaa','age':26} " ;
        JSONObject myJson  =   new  JSONObject(jsonContent);
        String strName  =  myJson.getString( " name " ).toString();
        String strAge  = String.valueOf(myJson.getInt( " age " ));
        System.out.println(strName);
        System.out.println(strAge);
    }
    @Test
     public   void  TestJson02()  throws  JSONException
    {
        String jsonContent  = " [{'name':'lixiaodaoaaa','age':22}, "   +
                 " {'name':'lihao','age':26}, "   +
                 " {'name':'libo','age':27}] " ;
        JSONArray myJsonArray  =   new  JSONArray(jsonContent);
        String strName1   =  myJsonArray.getJSONObject( 0 ).getString( " name " );
        String strName2   =  myJsonArray.getJSONObject( 1 ).getString( " name " );
        String strName3   =  myJsonArray.getJSONObject( 2 ).getString( " name " );
        String strAge1  =  String.valueOf(myJsonArray.getJSONObject( 0 ).getInt( " age " ));
        String strAge2  =  String.valueOf(myJsonArray.getJSONObject( 1 ).getInt( " age " ));
        String strAge3  =  String.valueOf(myJsonArray.getJSONObject( 2 ).getInt( " age " ));
        System.out.println(strName1 + " .************. " + strAge1);
        System.out.println(strName2 + " .************. " + strAge2);
        System.out.println(strName3 + " .************. " + strAge3);
    }
    @Test
     public   void  TestJson03()  throws  JSONException
    {
        String jsonString  =   " [{'key':{'name':'lixiaodaoaaa','age':22}}, {'key':{'name':'lihao','age':21}},{'key':{'name':'libo','age':23}}] " ;
        JSONArray myjsonArray  =   new  JSONArray(jsonString);
         for ( int  i = 0 ;i < myjsonArray.length();i ++ )
        {
            String strName  =  myjsonArray.getJSONObject(i).getJSONObject( " key " ).get( " name " ).toString();
            String strAge  =  String.valueOf(myjsonArray.getJSONObject(i).getJSONObject( " key " ).getInt( " age " ));
            System.out.println(strName + " ************************ " + strAge);
        }
    }
}

 

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